pyximport.install() in sitecustomize.py is not a good idea

[mahyarkoy]

Description of your problem

pyximport.install() in utils/site/sitecustomize.py causes errors when importing.

What steps will reproduce the problem?

1. Have two files example.so and example.pyx in the same location
2. Try import example
3. Import will throw error, because pyximport is hooked

What is the expected output? What do you see instead?
Instead of importing example.so, it throws "Error compiling Cython file"

Please provide any additional information below
In general, it is misleading to have the pyximport hooked to import

Versions and main components

• Spyder Version: 3.2.3
• Python Version: 2.7.12
• Qt Version: 5
• PyQt Version: 5
• Operating system: Ubuntu 16.04

Dependencies

Please go to the menu entry Help > Optional Dependencies (or
Help > Dependencies), press the button Copy to clipboard
and paste the contents below:
IPython >=4.0;<6.0: 5.5.0 (OK)
cython >=0.21 : 0.26.1 (OK)
jedi >=0.9.0 : 0.10.2 (OK)
nbconvert >=4.0 : 5.3.1 (OK)
numpy >=1.7 : 1.13.1 (OK)
pandas >=0.13.1 : 0.20.3 (OK)
psutil >=0.3 : 5.3.1 (OK)
pycodestyle >=2.3 : 2.3.1 (OK)
pyflakes >=0.5.0 : 1.6.0 (OK)
pygments >=2.0 : 2.2.0 (OK)
pylint >=0.25 : 1.7.2 (OK)
qtconsole >=4.2.0 : 4.3.1 (OK)
rope >=0.9.4 : 0.10.7 (OK)
sphinx >=0.6.6 : 1.6.3 (OK)
sympy >=0.7.3 : None (NOK)

[ccordoba12]

How do you propose we fix this?

[ccordoba12]

Note to self: take a look at

https://stackoverflow.com/questions/46422488/get-rid-of-pyximport